Uniqlo men’s jacket sizing question

[MelanieFrontage]

Hi everyone, I’d like to buy DH a Uniqlo Hybrid Ultra Warm down coat for Christmas but am unsure on sizing.
He’s a medium jacket in any other brand. Would he also be a Uniqlo medium or are the men’s small like the women’s? I’m unsure whether to size up to large.
Thanks!

DH is a medium and gets a medium in Uniqlo. He's a 38" chest I think if that's any help!